【作者】 刘雪婷； 程聪； 王晓慧； 杨广生； 姜春杰；

【Author】 Xue-Ting Liu;Cong Cheng;Xiao-Hui Wang;Guang-Sheng Yang;Chun-Jie Jiang;School of Chemistry and Chemical Engineering, Liaoning Normal University;

【机构】 辽宁师范大学化学化工学院；

【摘要】 MOF-5作为一个经典的金属-有机框架化合物,在气体存储、分子选择性吸收和多相催化等领域展示了广泛的应用前景^[1,2]。然而,它的潮湿敏感性限制了其真正应用。因此,构筑抗潮湿型类MOF-5结构对于该类化合物的实际应用具有重要意义。基于合理的结构设计,我们使用自主设计的含有疏水芳环取代基的线性二所羧酸配体3-（4-bromophenyl）-4-methylthieno[2,3-b]thiophene-2,5-dicarboxylic acid（L1）,3-（4-methoxyphenyl）-4-methylthieno[2,3-b]thiophene-2,5-dicarbsoxylic acid（L2）,3-methyl-4-（naphthalen-2-yl）thieno[2,3-b]thiophene-2,5-dicarboxylic acid（L3）和3-（4-biphenyl）-4-methylthieno[2,3-b]thiophene-2,5-dicarboxylic acid（L4）成功构筑了四个新颖的类MOF-5化合物,分别为Zn₄O（L1）₃（MRMOF-1）、Zn₄O（L2）₃（MRMOF-2）、Zn₄O（L3）₃（MRMOF-3）和Zn₄O（L4）₃（MRMOF-4）（MRMOF,moisture-resistant MOFs的缩写）。单晶X-射线衍射实验确认了它们的结构与MOF-5是同构的。粉末X-射线衍射结果显示,四个类MOF-5化合物具有良好的抗潮湿性,这归因于具有较大空间障碍的疏水芳基有效防止了水分子攻击Zn₄O结构单元。显著改善的稳定性有助于我们进一步研究该类化合物的功能特性,从而推动该类材料的实际应用。N₂吸附研究证明该类化合物具有大的比表面积(849.0-1620.5m²g^-1)。此外,该类化合物对空气中的碘分子表现出显著的吸附能力（52.4-68.8wt%）,有希望应用于环境中放射性碘单质的移除。更多还原

【Abstract】 MOF-5,as a classic metal-organic framework compound,has exhibit wide varieties of potential applications in gas storage,molecular selective absorption,and heterogeneous catalysis.^[1,2]However,it is moisture sensitive,which has considerably limited its further application.Hence,it is important to construct MOF-5 analogues with good moisture resistance for practical application.Based on the rational design of structure,four novel MOF-5 analogues,Zn₄ O（L1）₃（MRMOF-1）,Zn₄ O（L2）₃（MRMOF-2）,Zn₄ O（L3）₃（MRMOF-3） and Zn₄ O（L4）₃（MRMOF-4）（MRMOF,abbreviation of moisture resistant MOFs）,have been successfully constructed from series of self-designed linear dicarboxylic acid ligands containing hydrophobic aromatic ring substituents.which are 3-（4-bromophenyl）-4-methylthieno[2,3-b]thiophene-2,5-dicarboxylic acid（L1）,3-（4-methoxyphenyl）-4-methylthieno[2,3-b]thiophene-2,5-dicarbsoxylic acid（L2）,3-methyl-4-（naphthalen-2-yl） thieno[2,3-b]thiophene-2,5-dicarboxylic acid（L3）,and 3-（4-biphenyl）-4-methylthieno[2,3-b]thiophene-2,5-dicarboxylic acid（L4）.Single-crystal X-ray diffraction indicates that they are isostructural to MOF-5.Power X-ray diffraction analysis shows that the four MOF-5 analogues have good moisture resistance,which attributes that hydrophobic aryl groups with strong sterohindrance can protect Zn₄ O clusters from attack of water molecules.N₂ adsorption study indicates that these compounds have high BET surface area(849.0-1620.5 m² g^-1).The significant improvement in stability will help us to develop their functional properties of these MOFs in the future,so that such materials are expected to be truly used in practice.In addition,these compounds exhibit excellent remarkable adsorption ability to iodine molecule in the air（52.4-68.8 wt%）,and have the potential application in the removement of radioactive iodine in the environment.更多还原